Science Optics Unit Test Grade 10 Flashcards
Incandescence is:
when light is produced by an object such as metal at very high temperatures
Bioluminescence is:
the ability of a plant or animal to produce light
Chemiluminescence is:
light produced from chemical reaction without a rise in temperature
Flourescence is:
light emitted by substances exposed to electromagnetic radiation
Phosphorescence is:
when an object stores energy from a source of light and then emits it slowly over a period of time
Triboluminescence is:
light produced from friction
Light Emitting Diode (LED) is:
The process of transferring electric energy directly into light energy
Electric Discharge is:
electric current pases through air or another gas
Electroluminescence is:
a material that emits light in response to the application of an electrical current or a strong electric field
Organic Light Emitting Display (OLED) is:
light source made of several thin layers of organic molecules that can use electric current to produce light
Plasma Display is:
when a signal causes a gas to release UV radiation that is absorbed by phosphors. Colors red, green and blue are produced.
Liquid Crystal Display (LCD) consists of:
many crystals that are lit up by a white light and are filtered by red, blue and green color filters. A special filter also blocks colors in any combination to produce a certain color.
Magnification equation for height
M = h i/ h o
Magnification equation for distance
M = - d i/ do
Where is the angle of incidence?
Between the normal and the light ray coming from the first medium
Where is the angle of refraction?
Between the normal and the light ray entering into the second medium
When the light ray travels from a less dense to a more dense medium, it will:
Slow down and bend towards the normal
When the light ray travels from a more dense to a less dense medium, it will:
Speed up and bend away from the normal
Calculate the speed of light in ice if:
n = 1.31
c = 3x 10*8
3x 10*8
- ———- = 2.29 x 10*8
- 31
What is the refraction equation?
n = c / v
Snell’s law
n2/ n1 = sin< 2/ sin< 1
A concave mirror creates a virtual image of candle flame that is 10 cm high. If the magnification of the mirror is 12.5, what is the height of the candle flame?
h o = 0.8 cm
Human hair is placed 3 mm from a powerful microscope lens that has a magnification of 40 times. How far from the lens will the image be formed?
d i = - 120 mm
Period and Frequency equation
T x f = 1
